Human Factors Issues of Glare

Glare Human Factor The glare problem affects everyone. Normally it is only a brief annoyance, but glare may cause serious consequences. For example, problems caused by computer screen glare cause annual optometrist of 10 million per year (Berman, 1998). There are two kinds of glare: unpleasant glare and obstacle glare. The type of glare is characterized by its origin. The unpleasant glare comes from an external source; it is the physical sensation experienced when the light source is too bright.

Glare or "discomfort glare in the work environment" 25 is very important, especially as the use of computer screens gets more compromised in the office, lighting is a very complicated problem. Computers are portable and it is difficult to design calculations because the position may change at different points in the life of the building. Glare and reflection are affected not only by the color and surface of the environment but also by furniture. People are the main assets and expenses of the company. Lippiatt estimates employee salary is about 13 times the construction cost 26 Of course, these resources are managed to achieve optimal productivity, efficiency, and sustainability . Productivity costs are not so obvious, so it is difficult to quantify and evaluate.

A new study at Cornell University shows that an optical glass glare filter on a computer monitor helps alleviate health and visual problems associated with computer glare and improve computer user productivity. After using the glass anti-glare filter, the proportion of problems related to fatigue, blindness, itching / water eye, dry eye is half of the filter before use. Allen Hatch, director of Human Factors Laboratory professor of Cornell University's design and environmental analysis, says that this applies to people using computer monitors throughout the day. In addition, 80% of users use filters to make the screen easier to read, and more than half say that using a filter improves productivity. The anti-glare filter is indispensable for safe workstations.

Several measuring methods have been developed to control glare caused by room lighting design. Uniform glare level (UGR), visual comfort probability and daylight glare index are some of the most famous measurement methods. In addition to these new methods, there are four main factors that affect glare discomfort; the glare source's brightness, the glare source solid angle, the background brightness, and the location of the glare source within the field of view .